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About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

     

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

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HTML

            
              <pre>
border: 20px solid green;  
border-image-source: linear-gradient(lightgreen, darkgreen);
border-image-slice: 20;
</pre> 

<p class="box">box</p>

<p class="css-mine">
  <small>
  (<a href="http://www.cssmine.com/css3-border-image" target="_blank">CSS3 Border Image</a>  at CSS Mine)
  </small>
</p>
!

CSS

            
              .box {
  border: 20px solid green;  
  border-image-source: linear-gradient(lightgreen, darkgreen);
  border-image-slice: 20;
  padding: 2em;
}

.css-mine {
  margin-top: 2em;
  clear: both;
}

body {
  margin: 1.5em;
}
!

JS
!
999px
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